Merged role changer code into master
diff --git a/cassandra.titan b/cassandra.titan
new file mode 100644
index 0000000..ef6f3ae
--- /dev/null
+++ b/cassandra.titan
@@ -0,0 +1,3 @@
+storage.backend=cassandra
+storage.hostname=localhost
+storage.keyspace=onos
diff --git a/src/main/java/net/floodlightcontroller/core/INetMapTopologyService.java b/src/main/java/net/floodlightcontroller/core/INetMapTopologyService.java
index a3eb830..b16e4a9 100644
--- a/src/main/java/net/floodlightcontroller/core/INetMapTopologyService.java
+++ b/src/main/java/net/floodlightcontroller/core/INetMapTopologyService.java
@@ -8,6 +8,8 @@
 import net.floodlightcontroller.core.INetMapTopologyObjects.ISwitchObject;
 import net.floodlightcontroller.routing.Link;
 import net.floodlightcontroller.topology.NodePortTuple;
+import net.floodlightcontroller.util.DataPath;
+import net.floodlightcontroller.util.SwitchPort;
 
 public interface INetMapTopologyService extends INetMapService {
 
@@ -31,8 +33,8 @@
 	}
 	
 	public interface ITopoRouteService extends IFloodlightService {
-		List<NodePortTuple> getShortestPath(NodePortTuple src, NodePortTuple dest);
-		Boolean routeExists(NodePortTuple src, NodePortTuple dest);
+	    DataPath getShortestPath(SwitchPort src, SwitchPort dest);
+	    Boolean routeExists(SwitchPort src, SwitchPort dest);
 	}
 	
 	public interface ITopoFlowService {
diff --git a/src/main/java/net/floodlightcontroller/flowcache/web/AddFlowResource.java b/src/main/java/net/floodlightcontroller/flowcache/web/AddFlowResource.java
index f32d124..feb43d3 100644
--- a/src/main/java/net/floodlightcontroller/flowcache/web/AddFlowResource.java
+++ b/src/main/java/net/floodlightcontroller/flowcache/web/AddFlowResource.java
@@ -1,9 +1,15 @@
 package net.floodlightcontroller.flowcache.web;
 
+import java.io.IOException;
+
 import net.floodlightcontroller.flowcache.IFlowService;
 import net.floodlightcontroller.util.FlowId;
 import net.floodlightcontroller.util.FlowPath;
 
+import org.codehaus.jackson.JsonGenerationException;
+import org.codehaus.jackson.map.ObjectMapper;
+import org.codehaus.jackson.map.JsonMappingException;
+import org.codehaus.jackson.map.ObjectMapper;
 import org.restlet.resource.Get;
 import org.restlet.resource.ServerResource;
 import org.slf4j.Logger;
@@ -26,14 +32,29 @@
             return result;
 	}
 
+	//
 	// Extract the arguments
+	// NOTE: The "flow" is specified in JSON format.
+	//
+	ObjectMapper mapper = new ObjectMapper();
 	String flowPathStr = (String) getRequestAttributes().get("flow");
-	FlowPath flowPath = new FlowPath(flowPathStr);
-
+	FlowPath flowPath = null;
 	log.debug("Add Flow Path: " + flowPathStr);
+	try {
+	    flowPath = mapper.readValue(flowPathStr, FlowPath.class);
+	} catch (JsonGenerationException e) {
+	    e.printStackTrace();
+	} catch (JsonMappingException e) {
+	    e.printStackTrace();
+	} catch (IOException e) {
+	    e.printStackTrace();
+	}
 
-	if (flowService.addFlow(flowPath, result) != true) {
-	    result = new FlowId();	// Error: Empty Flow Id
+	// Process the request
+	if (flowPath != null) {
+	    if (flowService.addFlow(flowPath, result) != true) {
+		result = new FlowId();		// Error: Return empty Flow Id
+	    }
 	}
 
         return result;
diff --git a/src/main/java/net/floodlightcontroller/flowcache/web/DeleteFlowResource.java b/src/main/java/net/floodlightcontroller/flowcache/web/DeleteFlowResource.java
index cefad18..f418c1e 100644
--- a/src/main/java/net/floodlightcontroller/flowcache/web/DeleteFlowResource.java
+++ b/src/main/java/net/floodlightcontroller/flowcache/web/DeleteFlowResource.java
@@ -27,12 +27,11 @@
 
 	// Extract the arguments
 	String flowIdStr = (String) getRequestAttributes().get("flow-id");
-	FlowId flowId = new FlowId(HexString.toLong(flowIdStr));
-
+	FlowId flowId = new FlowId(flowIdStr);
 	log.debug("Delete Flow Id: " + flowIdStr);
 
+	// Process the request
 	result = flowService.deleteFlow(flowId);
-
-        return result;
+	return result;
     }
 }
diff --git a/src/main/java/net/floodlightcontroller/flowcache/web/GetAllFlowsByEndpointsResource.java b/src/main/java/net/floodlightcontroller/flowcache/web/GetAllFlowsByEndpointsResource.java
index 4e96c0c..c485d91 100644
--- a/src/main/java/net/floodlightcontroller/flowcache/web/GetAllFlowsByEndpointsResource.java
+++ b/src/main/java/net/floodlightcontroller/flowcache/web/GetAllFlowsByEndpointsResource.java
@@ -9,7 +9,6 @@
 import net.floodlightcontroller.util.Port;
 import net.floodlightcontroller.util.SwitchPort;
 
-import org.openflow.util.HexString;
 import org.restlet.resource.Get;
 import org.restlet.resource.ServerResource;
 import org.slf4j.Logger;
@@ -40,9 +39,9 @@
 	log.debug("Get All Flows Endpoints: " + srcDpidStr + "--" +
 		  srcPortStr + "--" + dstDpidStr + "--" + dstPortStr);
 
-	Dpid srcDpid = new Dpid(HexString.toLong(srcDpidStr));
+	Dpid srcDpid = new Dpid(srcDpidStr);
 	Port srcPort = new Port(Short.parseShort(srcPortStr));
-	Dpid dstDpid = new Dpid(HexString.toLong(dstDpidStr));
+	Dpid dstDpid = new Dpid(dstDpidStr);
 	Port dstPort = new Port(Short.parseShort(dstPortStr));
 	SwitchPort srcSwitchPort = new SwitchPort(srcDpid, srcPort);
 	SwitchPort dstSwitchPort = new SwitchPort(dstDpid, dstPort);
diff --git a/src/main/java/net/floodlightcontroller/flowcache/web/GetAllFlowsResource.java b/src/main/java/net/floodlightcontroller/flowcache/web/GetAllFlowsResource.java
index 5bf3a50..deb4d04 100644
--- a/src/main/java/net/floodlightcontroller/flowcache/web/GetAllFlowsResource.java
+++ b/src/main/java/net/floodlightcontroller/flowcache/web/GetAllFlowsResource.java
@@ -30,6 +30,8 @@
 	log.debug("Get All Flows Endpoints");
 
 	flowService.getAllFlows(result);
+	FlowPath flowPath = new FlowPath();
+	result.add(flowPath);
 
         return result;
     }
diff --git a/src/main/java/net/floodlightcontroller/flowcache/web/GetFlowByIdResource.java b/src/main/java/net/floodlightcontroller/flowcache/web/GetFlowByIdResource.java
index 2863c79..d5b2730 100644
--- a/src/main/java/net/floodlightcontroller/flowcache/web/GetFlowByIdResource.java
+++ b/src/main/java/net/floodlightcontroller/flowcache/web/GetFlowByIdResource.java
@@ -4,7 +4,6 @@
 import net.floodlightcontroller.util.FlowId;
 import net.floodlightcontroller.util.FlowPath;
 
-import org.openflow.util.HexString;
 import org.restlet.resource.Get;
 import org.restlet.resource.ServerResource;
 import org.slf4j.Logger;
@@ -28,7 +27,7 @@
 
 	// Extract the arguments
 	String flowIdStr = (String) getRequestAttributes().get("flow-id");
-	FlowId flowId = new FlowId(HexString.toLong(flowIdStr));
+	FlowId flowId = new FlowId(flowIdStr);
 
 	log.debug("Get Flow Id: " + flowIdStr);
 
diff --git a/src/main/java/net/floodlightcontroller/flowcache/web/GetFlowByInstallerIdResource.java b/src/main/java/net/floodlightcontroller/flowcache/web/GetFlowByInstallerIdResource.java
index 6b5f7f4..cb4e6ef 100644
--- a/src/main/java/net/floodlightcontroller/flowcache/web/GetFlowByInstallerIdResource.java
+++ b/src/main/java/net/floodlightcontroller/flowcache/web/GetFlowByInstallerIdResource.java
@@ -8,7 +8,6 @@
 import net.floodlightcontroller.util.Port;
 import net.floodlightcontroller.util.SwitchPort;
 
-import org.openflow.util.HexString;
 import org.restlet.resource.Get;
 import org.restlet.resource.ServerResource;
 import org.slf4j.Logger;
@@ -42,9 +41,9 @@
 		  dstDpidStr + "--" + dstPortStr);
 
 	CallerId installerId = new CallerId(installerIdStr);
-	Dpid srcDpid = new Dpid(HexString.toLong(srcDpidStr));
+	Dpid srcDpid = new Dpid(srcDpidStr);
 	Port srcPort = new Port(Short.parseShort(srcPortStr));
-	Dpid dstDpid = new Dpid(HexString.toLong(dstDpidStr));
+	Dpid dstDpid = new Dpid(dstDpidStr);
 	Port dstPort = new Port(Short.parseShort(dstPortStr));
 	SwitchPort srcSwitchPort = new SwitchPort(srcDpid, srcPort);
 	SwitchPort dstSwitchPort = new SwitchPort(dstDpid, dstPort);
diff --git a/src/main/java/net/floodlightcontroller/linkdiscovery/internal/LinkDiscoveryManager.java b/src/main/java/net/floodlightcontroller/linkdiscovery/internal/LinkDiscoveryManager.java
index df42075..6763c23 100644
--- a/src/main/java/net/floodlightcontroller/linkdiscovery/internal/LinkDiscoveryManager.java
+++ b/src/main/java/net/floodlightcontroller/linkdiscovery/internal/LinkDiscoveryManager.java
@@ -606,6 +606,10 @@
         if (!isReverse && autoPortFastFeature && isFastPort(sw, port))
             return;
 
+        // FIXME ONOS does not support BSN packets 
+        if (!isStandard) {
+        	return;
+        }
         if (log.isTraceEnabled()) {
             log.trace("Sending LLDP packet out of swich: {}, port: {}",
                       sw, port);
diff --git a/src/main/java/net/floodlightcontroller/routing/TopoRouteService.java b/src/main/java/net/floodlightcontroller/routing/TopoRouteService.java
index 6d50602..f979cc7 100644
--- a/src/main/java/net/floodlightcontroller/routing/TopoRouteService.java
+++ b/src/main/java/net/floodlightcontroller/routing/TopoRouteService.java
@@ -13,7 +13,11 @@
 import net.floodlightcontroller.core.module.IFloodlightModule;
 import net.floodlightcontroller.core.module.IFloodlightService;
 import net.floodlightcontroller.core.INetMapTopologyService.ITopoRouteService;
-import net.floodlightcontroller.topology.NodePortTuple;
+import net.floodlightcontroller.util.DataPath;
+import net.floodlightcontroller.util.Dpid;
+import net.floodlightcontroller.util.FlowEntry;
+import net.floodlightcontroller.util.Port;
+import net.floodlightcontroller.util.SwitchPort;
 
 import org.openflow.util.HexString;
 
@@ -87,14 +91,17 @@
     SwitchStorageImpl swStore = store.get();
 
     @Override
-    public List<NodePortTuple> getShortestPath(NodePortTuple src,
-					       NodePortTuple dest) {
-	List<NodePortTuple> result_list = new ArrayList<NodePortTuple>();
+    public DataPath getShortestPath(SwitchPort src, SwitchPort dest) {
+	DataPath result_data_path = new DataPath();
+
+	// Initialize the source and destination in the data path to return
+	result_data_path.setSrcPort(src);
+	result_data_path.setDstPort(dest);
 
 	TitanGraph titanGraph = swStore.graph;
 
-	String dpid_src = HexString.toHexString(src.getNodeId());
-	String dpid_dest = HexString.toHexString(dest.getNodeId());
+	String dpid_src = src.dpid().toString();
+	String dpid_dest = dest.dpid().toString();
 
 	//
 	// Implement the Shortest Path between two vertices by using
@@ -120,16 +127,18 @@
 
 	//
 	// Test whether we are computing a path from/to the same DPID.
-	// If "yes", then just list the "src" and "dest" in the return
-	// result.
+	// If "yes", then just add a single flow entry in the return result.
 	// NOTE: The return value will change in the future to return
 	// a single hop/entry instead of two. Currently, we need
 	// both entries to capture the source and destination ports.
 	//
 	if (dpid_src.equals(dpid_dest)) {
-	    result_list.add(new NodePortTuple(src));
-	    result_list.add(new NodePortTuple(dest));
-	    return result_list;
+	    FlowEntry flowEntry = new FlowEntry();
+	    flowEntry.setDpid(src.dpid());
+	    flowEntry.setInPort(src.port());
+	    flowEntry.setOutPort(dest.port());
+	    result_data_path.flowEntries().add(flowEntry);
+	    return result_data_path;
 	}
 
 	//
@@ -151,11 +160,13 @@
 	}
 
 	//
-	// Loop through the result and return the list
+	// Loop through the result and collect the list
 	// of <dpid, port> tuples.
 	//
 	long nodeId = 0;
 	short portId = 0;
+	Port inPort = new Port(src.port().value());
+	Port outPort = new Port();
 	for (ArrayList<Vertex> lv : results) {
 	    int idx = 0;
 	    for (Vertex v: lv) {
@@ -181,27 +192,48 @@
 
 		    System.out.println("dpid: " + dpid);
 		}
-		if (idx == 0) {
-		    idx++;
+		idx++;
+		if (idx == 1) {
 		    continue;
 		}
-		int mod = (idx - 1) % 3;
-		if ((mod == 0) || (mod == 2))  {
-		    result_list.add(new NodePortTuple(nodeId, portId));
+		int mod = idx % 3;
+		if (mod == 0) {
+		    // Setup the incoming port
+		    inPort = new Port(portId);
+		    continue;
 		}
-		idx++;
+		if (mod == 2) {
+		    // Setup the outgoing port, and add the Flow Entry
+		    outPort = new Port(portId);
+
+		    FlowEntry flowEntry = new FlowEntry();
+		    flowEntry.setDpid(new Dpid(nodeId));
+		    flowEntry.setInPort(inPort);
+		    flowEntry.setOutPort(outPort);
+		    result_data_path.flowEntries().add(flowEntry);
+		    continue;
+		}
+	    }
+
+	    if (idx > 0) {
+		// Add the last Flow Entry
+		FlowEntry flowEntry = new FlowEntry();
+		flowEntry.setDpid(new Dpid(nodeId));
+		flowEntry.setInPort(inPort);
+		flowEntry.setOutPort(dest.port());
+		result_data_path.flowEntries().add(flowEntry);
 	    }
 	}
-	if (result_list.size() > 0)
-	    return result_list;
+	if (result_data_path.flowEntries().size() > 0)
+	    return result_data_path;
 
 	return null;
     }
 
     @Override
-    public Boolean routeExists(NodePortTuple src, NodePortTuple dest) {
-	List<NodePortTuple> route = getShortestPath(src, dest);
-	if (route != null)
+    public Boolean routeExists(SwitchPort src, SwitchPort dest) {
+	DataPath dataPath = getShortestPath(src, dest);
+	if (dataPath != null)
 	    return true;
 	return false;
     }
diff --git a/src/main/java/net/floodlightcontroller/topology/web/RouteResource.java b/src/main/java/net/floodlightcontroller/topology/web/RouteResource.java
index 3fa7510..20f39d4 100644
--- a/src/main/java/net/floodlightcontroller/topology/web/RouteResource.java
+++ b/src/main/java/net/floodlightcontroller/topology/web/RouteResource.java
@@ -6,6 +6,10 @@
 import net.floodlightcontroller.routing.IRoutingService;
 import net.floodlightcontroller.routing.Route;
 import net.floodlightcontroller.topology.NodePortTuple;
+import net.floodlightcontroller.util.DataPath;
+import net.floodlightcontroller.util.Dpid;
+import net.floodlightcontroller.util.Port;
+import net.floodlightcontroller.util.SwitchPort;
 
 import org.openflow.util.HexString;
 import org.restlet.resource.Get;
@@ -18,7 +22,7 @@
     protected static Logger log = LoggerFactory.getLogger(RouteResource.class);
 
     @Get("json")
-    public List<NodePortTuple> retrieve() {
+    public DataPath retrieve() {
         ITopoRouteService topoRouteService = 
                 (ITopoRouteService)getContext().getAttributes().
                     get(ITopoRouteService.class.getCanonicalName());
@@ -27,22 +31,22 @@
 	    return null;
 	}
         
-        String srcDpid = (String) getRequestAttributes().get("src-dpid");
-        String srcPort = (String) getRequestAttributes().get("src-port");
-        String dstDpid = (String) getRequestAttributes().get("dst-dpid");
-        String dstPort = (String) getRequestAttributes().get("dst-port");
+        String srcDpidStr = (String) getRequestAttributes().get("src-dpid");
+        String srcPortStr = (String) getRequestAttributes().get("src-port");
+        String dstDpidStr = (String) getRequestAttributes().get("dst-dpid");
+        String dstPortStr = (String) getRequestAttributes().get("dst-port");
 
-        log.debug( srcDpid + "--" + srcPort + "--" + dstDpid + "--" + dstPort);
+        log.debug( srcDpidStr + "--" + srcPortStr + "--" + dstDpidStr + "--" + dstPortStr);
 
-        long longSrcDpid = HexString.toLong(srcDpid);
-        short shortSrcPort = Short.parseShort(srcPort);
-        long longDstDpid = HexString.toLong(dstDpid);
-        short shortDstPort = Short.parseShort(dstPort);
+	Dpid srcDpid = new Dpid(srcDpidStr);
+	Port srcPort = new Port(Short.parseShort(srcPortStr));
+	Dpid dstDpid = new Dpid(dstDpidStr);
+	Port dstPort = new Port(Short.parseShort(dstPortStr));
         
-	List<NodePortTuple> result =
-	    topoRouteService.getShortestPath(new NodePortTuple(longSrcDpid, shortSrcPort),
-					     new NodePortTuple(longDstDpid, shortDstPort));
-	if ((result != null) && (result.size() > 0)) {
+	DataPath result =
+	    topoRouteService.getShortestPath(new SwitchPort(srcDpid, srcPort),
+					     new SwitchPort(dstDpid, dstPort));
+	if (result != null) {
 	    return result;
 	} else {
             log.debug("ERROR! no route found");
diff --git a/src/main/java/net/floodlightcontroller/util/CallerId.java b/src/main/java/net/floodlightcontroller/util/CallerId.java
index 200b9e0..ade0f0d 100644
--- a/src/main/java/net/floodlightcontroller/util/CallerId.java
+++ b/src/main/java/net/floodlightcontroller/util/CallerId.java
@@ -1,14 +1,10 @@
 package net.floodlightcontroller.util;
 
-import net.floodlightcontroller.util.serializers.CallerIdSerializer;
-
 import org.codehaus.jackson.annotate.JsonProperty;
-import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing a Caller ID for an ONOS component.
  */
-@JsonSerialize(using=CallerIdSerializer.class)
 public class CallerId {
     private String value;
 
@@ -31,6 +27,7 @@
      *
      * @return the value of the Caller ID.
      */
+    @JsonProperty("value")
     public String value() { return value; }
 
     /**
@@ -38,6 +35,7 @@
      *
      * @param value the value to set.
      */
+    @JsonProperty("value")
     public void setValue(String value) {
 	this.value = value;
     }
diff --git a/src/main/java/net/floodlightcontroller/util/DataPath.java b/src/main/java/net/floodlightcontroller/util/DataPath.java
index ad6cdb8..71e0a2f 100644
--- a/src/main/java/net/floodlightcontroller/util/DataPath.java
+++ b/src/main/java/net/floodlightcontroller/util/DataPath.java
@@ -4,15 +4,12 @@
 
 import net.floodlightcontroller.util.SwitchPort;
 import net.floodlightcontroller.util.FlowEntry;
-import net.floodlightcontroller.util.serializers.DataPathSerializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
-import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing the Data Path.
  */
-@JsonSerialize(using=DataPathSerializer.class)
 public class DataPath {
     private SwitchPort srcPort;		// The source port
     private SwitchPort dstPort;		// The destination port
@@ -22,6 +19,7 @@
      * Default constructor.
      */
     public DataPath() {
+	flowEntries = new ArrayList<FlowEntry>();
     }
 
     /**
@@ -29,6 +27,7 @@
      *
      * @return the data path source port.
      */
+    @JsonProperty("srcPort")
     public SwitchPort srcPort() { return srcPort; }
 
     /**
@@ -36,6 +35,7 @@
      *
      * @param srcPort the data path source port to set.
      */
+    @JsonProperty("srcPort")
     public void setSrcPort(SwitchPort srcPort) {
 	this.srcPort = srcPort;
     }
@@ -45,6 +45,7 @@
      *
      * @return the data path destination port.
      */
+    @JsonProperty("dstPort")
     public SwitchPort dstPort() { return dstPort; }
 
     /**
@@ -52,6 +53,7 @@
      *
      * @param dstPort the data path destination port to set.
      */
+    @JsonProperty("dstPort")
     public void setDstPort(SwitchPort dstPort) {
 	this.dstPort = dstPort;
     }
@@ -61,6 +63,7 @@
      *
      * @return the data path flow entries.
      */
+    @JsonProperty("flowEntries")
     public ArrayList<FlowEntry> flowEntries() { return flowEntries; }
 
     /**
@@ -68,6 +71,7 @@
      *
      * @param flowEntries the data path flow entries to set.
      */
+    @JsonProperty("flowEntries")
     public void setFlowEntries(ArrayList<FlowEntry> flowEntries) {
 	this.flowEntries = flowEntries;
     }
diff --git a/src/main/java/net/floodlightcontroller/util/DataPathEndpoints.java b/src/main/java/net/floodlightcontroller/util/DataPathEndpoints.java
index 92cf2dd..3ee88d1 100644
--- a/src/main/java/net/floodlightcontroller/util/DataPathEndpoints.java
+++ b/src/main/java/net/floodlightcontroller/util/DataPathEndpoints.java
@@ -1,15 +1,12 @@
 package net.floodlightcontroller.util;
 
 import net.floodlightcontroller.util.SwitchPort;
-import net.floodlightcontroller.util.serializers.DataPathEndpointsSerializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
-import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing the Data Path Endpoints.
  */
-@JsonSerialize(using=DataPathEndpointsSerializer.class)
 public class DataPathEndpoints {
     private SwitchPort srcPort;		// The source port
     private SwitchPort dstPort;		// The destination port
@@ -36,6 +33,7 @@
      *
      * @return the data path source port.
      */
+    @JsonProperty("srcPort")
     public SwitchPort srcPort() { return srcPort; }
 
     /**
@@ -43,6 +41,7 @@
      *
      * @param srcPort the data path source port to set.
      */
+    @JsonProperty("srcPort")
     public void setSrcPort(SwitchPort srcPort) {
 	this.srcPort = srcPort;
     }
@@ -52,6 +51,7 @@
      *
      * @return the data path destination port.
      */
+    @JsonProperty("dstPort")
     public SwitchPort dstPort() { return dstPort; }
 
     /**
@@ -59,6 +59,7 @@
      *
      * @param dstPort the data path destination port to set.
      */
+    @JsonProperty("dstPort")
     public void setDstPort(SwitchPort dstPort) {
 	this.dstPort = dstPort;
     }
diff --git a/src/main/java/net/floodlightcontroller/util/Dpid.java b/src/main/java/net/floodlightcontroller/util/Dpid.java
index 7787953..5af6bea 100644
--- a/src/main/java/net/floodlightcontroller/util/Dpid.java
+++ b/src/main/java/net/floodlightcontroller/util/Dpid.java
@@ -1,14 +1,17 @@
 package net.floodlightcontroller.util;
 
 import org.openflow.util.HexString;
+import net.floodlightcontroller.util.serializers.DpidDeserializer;
 import net.floodlightcontroller.util.serializers.DpidSerializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
+import org.codehaus.jackson.map.annotate.JsonDeserialize;
 import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing a network switch DPID.
  */
+@JsonDeserialize(using=DpidDeserializer.class)
 @JsonSerialize(using=DpidSerializer.class)
 public class Dpid {
     static public long UNKNOWN = 0;
@@ -32,6 +35,15 @@
     }
 
     /**
+     * Constructor from a string.
+     *
+     * @param value the value to use.
+     */
+    public Dpid(String value) {
+	this.value = HexString.toLong(value);
+    }
+
+    /**
      * Get the value of the DPID.
      *
      * @return the value of the DPID.
diff --git a/src/main/java/net/floodlightcontroller/util/FlowEntry.java b/src/main/java/net/floodlightcontroller/util/FlowEntry.java
index 42ec935..dfb8f82 100644
--- a/src/main/java/net/floodlightcontroller/util/FlowEntry.java
+++ b/src/main/java/net/floodlightcontroller/util/FlowEntry.java
@@ -5,10 +5,8 @@
 import net.floodlightcontroller.util.FlowEntryId;
 import net.floodlightcontroller.util.FlowEntryMatch;
 import net.floodlightcontroller.util.Port;
-import net.floodlightcontroller.util.serializers.FlowEntrySerializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
-import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The Flow Entry state as set by the user (via the ONOS API).
@@ -38,7 +36,6 @@
  * NOTE: The specification is incomplete. E.g., the entry needs to
  * support multiple in-ports and multiple out-ports.
  */
-@JsonSerialize(using=FlowEntrySerializer.class)
 public class FlowEntry {
     private FlowEntryId flowEntryId;		// The Flow Entry ID
     private FlowEntryMatch flowEntryMatch;	// The Flow Entry Match
@@ -64,6 +61,7 @@
      *
      * @return the Flow Entry ID.
      */
+    @JsonProperty("flowEntryId")
     public FlowEntryId flowEntryId() { return flowEntryId; }
 
     /**
@@ -71,6 +69,7 @@
      *
      * @param flowEntryId the Flow Entry ID to set.
      */
+    @JsonProperty("flowEntryId")
     public void setFlowEntryId(FlowEntryId flowEntryId) {
 	this.flowEntryId = flowEntryId;
     }
@@ -80,6 +79,7 @@
      *
      * @return the Flow Entry Match.
      */
+    @JsonProperty("flowEntryMatch")
     public FlowEntryMatch flowEntryMatch() { return flowEntryMatch; }
 
     /**
@@ -87,6 +87,7 @@
      *
      * @param flowEntryMatch the Flow Entry Match to set.
      */
+    @JsonProperty("flowEntryMatch")
     public void setFlowEntryMatch(FlowEntryMatch flowEntryMatch) {
 	this.flowEntryMatch = flowEntryMatch;
     }
@@ -96,6 +97,7 @@
      *
      * @return the Flow Entry Actions.
      */
+    @JsonProperty("flowEntryActions")
     public FlowEntryActions flowEntryActions() { return flowEntryActions; }
 
     /**
@@ -103,6 +105,7 @@
      *
      * @param flowEntryActions the Flow Entry Actions to set.
      */
+    @JsonProperty("flowEntryActions")
     public void setFlowEntryActions(FlowEntryActions flowEntryActions) {
 	this.flowEntryActions = flowEntryActions;
     }
@@ -112,6 +115,7 @@
      *
      * @return the Switch DPID.
      */
+    @JsonProperty("dpid")
     public Dpid dpid() { return dpid; }
 
     /**
@@ -119,6 +123,7 @@
      *
      * @param dpid the Switch DPID to set.
      */
+    @JsonProperty("dpid")
     public void setDpid(Dpid dpid) {
 	this.dpid = dpid;
     }
@@ -128,6 +133,7 @@
      *
      * @return the Switch incoming port.
      */
+    @JsonProperty("inPort")
     public Port inPort() { return inPort; }
 
     /**
@@ -135,6 +141,7 @@
      *
      * @param inPort the Switch incoming port to set.
      */
+    @JsonProperty("inPort")
     public void setInPort(Port inPort) {
 	this.inPort = inPort;
     }
@@ -144,6 +151,7 @@
      *
      * @return the Switch outgoing port.
      */
+    @JsonProperty("outPort")
     public Port outPort() { return outPort; }
 
     /**
@@ -151,6 +159,7 @@
      *
      * @param outPort the Switch outgoing port to set.
      */
+    @JsonProperty("outPort")
     public void setOutPort(Port outPort) {
 	this.outPort = outPort;
     }
@@ -160,6 +169,7 @@
      *
      * @return the Flow Entry User state.
      */
+    @JsonProperty("flowEntryUserState")
     public FlowEntryUserState flowEntryUserState() {
 	return flowEntryUserState;
     }
@@ -169,6 +179,7 @@
      *
      * @param flowEntryUserState the Flow Entry User state to set.
      */
+    @JsonProperty("flowEntryUserState")
     public void setFlowEntryUserState(FlowEntryUserState flowEntryUserState) {
 	this.flowEntryUserState = flowEntryUserState;
     }
@@ -181,6 +192,7 @@
      *
      * @return the Flow Entry Switch state.
      */
+    @JsonProperty("flowEntrySwitchState")
     public FlowEntrySwitchState flowEntrySwitchState() {
 	return flowEntrySwitchState;
     }
@@ -193,6 +205,7 @@
      *
      * @param flowEntrySwitchState the Flow Entry Switch state to set.
      */
+    @JsonProperty("flowEntrySwitchState")
     public void setFlowEntrySwitchState(FlowEntrySwitchState flowEntrySwitchState) {
 	this.flowEntrySwitchState = flowEntrySwitchState;
     }
@@ -202,6 +215,7 @@
      *
      * @return the Flow Entry Error state.
      */
+    @JsonProperty("flowEntryErrorState")
     public FlowEntryErrorState flowEntryErrorState() {
 	return flowEntryErrorState;
     }
@@ -211,6 +225,7 @@
      *
      * @param flowEntryErrorState the Flow Entry Error state to set.
      */
+    @JsonProperty("flowEntryErrorState")
     public void setFlowEntryErrorState(FlowEntryErrorState flowEntryErrorState) {
 	this.flowEntryErrorState = flowEntryErrorState;
     }
diff --git a/src/main/java/net/floodlightcontroller/util/FlowEntryActions.java b/src/main/java/net/floodlightcontroller/util/FlowEntryActions.java
index b683d2c..4d17de8 100644
--- a/src/main/java/net/floodlightcontroller/util/FlowEntryActions.java
+++ b/src/main/java/net/floodlightcontroller/util/FlowEntryActions.java
@@ -1,9 +1,6 @@
 package net.floodlightcontroller.util;
 
-import net.floodlightcontroller.util.serializers.FlowEntryActionsSerializer;
-
 import org.codehaus.jackson.annotate.JsonProperty;
-import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing the Flow Entry set of actions.
@@ -13,7 +10,6 @@
  * NOTE: This is just an empty placeholder (for now). The implied action is
  * forwarding on a single port.
  */
-@JsonSerialize(using=FlowEntryActionsSerializer.class)
 public class FlowEntryActions {
 
     /**
diff --git a/src/main/java/net/floodlightcontroller/util/FlowEntryErrorState.java b/src/main/java/net/floodlightcontroller/util/FlowEntryErrorState.java
index f9ca8ba..bf1708d 100644
--- a/src/main/java/net/floodlightcontroller/util/FlowEntryErrorState.java
+++ b/src/main/java/net/floodlightcontroller/util/FlowEntryErrorState.java
@@ -1,14 +1,10 @@
 package net.floodlightcontroller.util;
 
-import net.floodlightcontroller.util.serializers.FlowEntryErrorStateSerializer;
-
 import org.codehaus.jackson.annotate.JsonProperty;
-import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing the Flow Entry error state.
  */
-@JsonSerialize(using=FlowEntryErrorStateSerializer.class)
 public class FlowEntryErrorState {
     private short type;	// The error type (e.g., see OF-1.3.1 spec, pp. 95)
     private short code;	// The error code (e.g., see OF-1.3.1 spec, pp. 95)
@@ -37,16 +33,38 @@
      *
      * @return the error type.
      */
+    @JsonProperty("type")
     public short type() { return type; }
 
     /**
+     * Set the error type.
+     *
+     * @param type the error type to use.
+     */
+    @JsonProperty("type")
+    public void setType(short type) {
+	this.type = type;
+    }
+
+    /**
      * Get the error code.
      *
      * @return the error code.
      */
+    @JsonProperty("code")
     public short code() { return code; }
 
     /**
+     * Set the error code.
+     *
+     * @param code the error code to use.
+     */
+    @JsonProperty("code")
+    public void setCode(short code) {
+	this.code = code;
+    }
+
+    /**
      * Set the values of the error type and code.
      *
      * @param type the error type to use.
diff --git a/src/main/java/net/floodlightcontroller/util/FlowEntryId.java b/src/main/java/net/floodlightcontroller/util/FlowEntryId.java
index bf1fc7d..0874bdb 100644
--- a/src/main/java/net/floodlightcontroller/util/FlowEntryId.java
+++ b/src/main/java/net/floodlightcontroller/util/FlowEntryId.java
@@ -1,13 +1,16 @@
 package net.floodlightcontroller.util;
 
+import net.floodlightcontroller.util.serializers.FlowEntryIdDeserializer;
 import net.floodlightcontroller.util.serializers.FlowEntryIdSerializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
+import org.codehaus.jackson.map.annotate.JsonDeserialize;
 import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing a Flow Entry ID.
  */
+@JsonDeserialize(using=FlowEntryIdDeserializer.class)
 @JsonSerialize(using=FlowEntryIdSerializer.class)
 public class FlowEntryId {
     private long value;
@@ -29,6 +32,15 @@
     }
 
     /**
+     * Constructor from a string.
+     *
+     * @param value the value to use.
+     */
+    public FlowEntryId(String value) {
+	this.value = Long.decode(value);
+    }
+
+    /**
      * Get the value of the Flow Entry ID.
      *
      * @return the value of the Flow Entry ID.
diff --git a/src/main/java/net/floodlightcontroller/util/FlowEntryMatch.java b/src/main/java/net/floodlightcontroller/util/FlowEntryMatch.java
index 0e3775e..9bd3bea 100644
--- a/src/main/java/net/floodlightcontroller/util/FlowEntryMatch.java
+++ b/src/main/java/net/floodlightcontroller/util/FlowEntryMatch.java
@@ -2,10 +2,8 @@
 
 import net.floodlightcontroller.util.MACAddress;
 import net.floodlightcontroller.util.IPv4Net;
-import net.floodlightcontroller.util.serializers.FlowEntryMatchSerializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
-import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing the Flow Entry Matching filter.
@@ -19,7 +17,6 @@
  * more matching fields, we need to indicate which fields need to be
  * matched, etc.
  */
-@JsonSerialize(using=FlowEntryMatchSerializer.class)
 public class FlowEntryMatch {
     private MACAddress srcMac;		// Matching source MAC address
     private MACAddress dstMac;		// Matching destination MAC address
@@ -37,6 +34,7 @@
      *
      * @return the matching source MAC address.
      */
+    @JsonProperty("srcMac")
     public MACAddress srcMac() { return srcMac; }
 
     /**
@@ -44,6 +42,7 @@
      *
      * @param srcMac the matching source MAC address to set.
      */
+    @JsonProperty("srcMac")
     public void setSrcMac(MACAddress srcMac) {
 	this.srcMac = srcMac;
     }
@@ -53,6 +52,7 @@
      *
      * @return the matching destination MAC address.
      */
+    @JsonProperty("dstMac")
     public MACAddress dstMac() { return dstMac; }
 
     /**
@@ -60,6 +60,7 @@
      *
      * @param dstMac the matching destination MAC address to set.
      */
+    @JsonProperty("dstMac")
     public void setDstMac(MACAddress dstMac) {
 	this.dstMac = dstMac;
     }
@@ -69,6 +70,7 @@
      *
      * @return the matching source IPv4 prefix.
      */
+    @JsonProperty("srcIPv4Net")
     public IPv4Net srcIPv4Net() { return srcIPv4Net; }
 
     /**
@@ -76,6 +78,7 @@
      *
      * @param srcIPv4Net the matching source IPv4 prefix to set.
      */
+    @JsonProperty("srcIPv4Net")
     public void setSrcIPv4Net(IPv4Net srcIPv4Net) {
 	this.srcIPv4Net = srcIPv4Net;
     }
@@ -85,6 +88,7 @@
      *
      * @return the matching destination IPv4 prefix.
      */
+    @JsonProperty("dstIPv4Net")
     public IPv4Net dstIPv4Net() { return dstIPv4Net; }
 
     /**
@@ -92,6 +96,7 @@
      *
      * @param srcIPv4Net the matching destination IPv4 prefix to set.
      */
+    @JsonProperty("dstIPv4Net")
     public void setDstIPv4Net(IPv4Net dstIPv4Net) {
 	this.dstIPv4Net = dstIPv4Net;
     }
diff --git a/src/main/java/net/floodlightcontroller/util/FlowId.java b/src/main/java/net/floodlightcontroller/util/FlowId.java
index a8beaa0..297c0c4 100644
--- a/src/main/java/net/floodlightcontroller/util/FlowId.java
+++ b/src/main/java/net/floodlightcontroller/util/FlowId.java
@@ -1,13 +1,16 @@
 package net.floodlightcontroller.util;
 
+import net.floodlightcontroller.util.serializers.FlowIdDeserializer;
 import net.floodlightcontroller.util.serializers.FlowIdSerializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
+import org.codehaus.jackson.map.annotate.JsonDeserialize;
 import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing a Flow ID.
  */
+@JsonDeserialize(using=FlowIdDeserializer.class)
 @JsonSerialize(using=FlowIdSerializer.class)
 public class FlowId {
     private long value;
@@ -29,6 +32,15 @@
     }
 
     /**
+     * Constructor from a string.
+     *
+     * @param value the value to use.
+     */
+    public FlowId(String value) {
+	this.value = Long.decode(value);
+    }
+
+    /**
      * Get the value of the Flow ID.
      *
      * @return the value of the Flow ID.
diff --git a/src/main/java/net/floodlightcontroller/util/FlowPath.java b/src/main/java/net/floodlightcontroller/util/FlowPath.java
index f91bb4a..5b3bbd1 100644
--- a/src/main/java/net/floodlightcontroller/util/FlowPath.java
+++ b/src/main/java/net/floodlightcontroller/util/FlowPath.java
@@ -3,15 +3,12 @@
 import net.floodlightcontroller.util.CallerId;
 import net.floodlightcontroller.util.DataPath;
 import net.floodlightcontroller.util.FlowId;
-import net.floodlightcontroller.util.serializers.FlowPathSerializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
-import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing the Flow Path.
  */
-@JsonSerialize(using=FlowPathSerializer.class)
 public class FlowPath {
     private FlowId flowId;		// The Flow ID
     private CallerId installerId;	// The Caller ID of the path installer
@@ -24,17 +21,11 @@
     }
 
     /**
-     * Constructor from a string.
-     */
-    public FlowPath(String str) {
-	// TODO: Implement it.
-    }
-
-    /**
      * Get the flow path Flow ID.
      *
      * @return the flow path Flow ID.
      */
+    @JsonProperty("flowId")
     public FlowId flowId() { return flowId; }
 
     /**
@@ -42,6 +33,7 @@
      *
      * @param flowId the flow path Flow ID to set.
      */
+    @JsonProperty("flowId")
     public void setFlowId(FlowId flowId) {
 	this.flowId = flowId;
     }
@@ -51,6 +43,7 @@
      *
      * @return the Caller ID of the flow path installer.
      */
+    @JsonProperty("installerId")
     public CallerId installerId() { return installerId; }
 
     /**
@@ -58,6 +51,7 @@
      *
      * @param installerId the Caller ID of the flow path installer.
      */
+    @JsonProperty("installerId")
     public void setInstallerId(CallerId installerId) {
 	this.installerId = installerId;
     }
@@ -67,6 +61,7 @@
      *
      * @return the flow path's data path.
      */
+    @JsonProperty("dataPath")
     public DataPath dataPath() { return dataPath; }
 
     /**
@@ -74,6 +69,7 @@
      *
      * @param dataPath the flow path's data path to set.
      */
+    @JsonProperty("dataPath")
     public void setDataPath(DataPath dataPath) {
 	this.dataPath = dataPath;
     }
diff --git a/src/main/java/net/floodlightcontroller/util/IPv4.java b/src/main/java/net/floodlightcontroller/util/IPv4.java
index 3f4f350..ef3a1e5 100644
--- a/src/main/java/net/floodlightcontroller/util/IPv4.java
+++ b/src/main/java/net/floodlightcontroller/util/IPv4.java
@@ -1,13 +1,16 @@
 package net.floodlightcontroller.util;
 
+import net.floodlightcontroller.util.serializers.IPv4Deserializer;
 import net.floodlightcontroller.util.serializers.IPv4Serializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
+import org.codehaus.jackson.map.annotate.JsonDeserialize;
 import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing an IPv4 address.
  */
+@JsonDeserialize(using=IPv4Deserializer.class)
 @JsonSerialize(using=IPv4Serializer.class)
 public class IPv4 {
     private int value;
@@ -29,6 +32,24 @@
     }
 
     /**
+     * Constructor from a string.
+     *
+     * @param value the value to use.
+     */
+    public IPv4(String value) {
+        String[] splits = value.split("\\.");
+        if (splits.length != 4)
+            throw new IllegalArgumentException("Specified IPv4 address must contain four " +
+					       "numerical digits separated by '.'");
+
+        int result = 0;
+        for (int i = 0; i < 4; ++i) {
+            result |= Integer.valueOf(splits[i]) << ((3-i)*8);
+        }
+	this.value = result;
+    }
+
+    /**
      * Get the value of the IPv4 address.
      *
      * @return the value of the IPv4 address.
diff --git a/src/main/java/net/floodlightcontroller/util/IPv4Net.java b/src/main/java/net/floodlightcontroller/util/IPv4Net.java
index f64ccb8..824e3e2 100644
--- a/src/main/java/net/floodlightcontroller/util/IPv4Net.java
+++ b/src/main/java/net/floodlightcontroller/util/IPv4Net.java
@@ -1,14 +1,17 @@
 package net.floodlightcontroller.util;
 
 import net.floodlightcontroller.util.IPv4;
+import net.floodlightcontroller.util.serializers.IPv4NetDeserializer;
 import net.floodlightcontroller.util.serializers.IPv4NetSerializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
+import org.codehaus.jackson.map.annotate.JsonDeserialize;
 import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing an IPv4 network address.
  */
+@JsonDeserialize(using=IPv4NetDeserializer.class)
 @JsonSerialize(using=IPv4NetSerializer.class)
 public class IPv4Net {
     private IPv4 address;		// The IPv4 address
@@ -33,6 +36,21 @@
     }
 
     /**
+     * Constructor from a string.
+     *
+     * @param value the value to use.
+     */
+    public IPv4Net(String value) {
+	String[] splits = value.split("/");
+	if (splits.length != 2) {
+	    throw new IllegalArgumentException("Specified IPv4Net address must contain an IPv4 " +
+					       "address and a prefix length separated by '/'");
+	}
+	this.address = new IPv4(splits[0]);
+	this.prefixLen = Short.decode(splits[1]);
+    }
+
+    /**
      * Get the address value of the IPv4Net address.
      *
      * @return the address value of the IPv4Net address.
@@ -40,6 +58,15 @@
     public IPv4 address() { return address; }
 
     /**
+     * Set the address value of the IPv4Net address.
+     *
+     * @param address the address to use.
+     */
+    public void setAddress(IPv4 address) {
+	this.address = address;
+    }
+
+    /**
      * Get the prefix length value of the IPv4Net address.
      *
      * @return the prefix length value of the IPv4Net address.
@@ -47,6 +74,15 @@
     public short prefixLen() { return prefixLen; }
 
     /**
+     * Set the prefix length value of the IPv4Net address.
+     *
+     * @param prefixLen the prefix length to use.
+     */
+    public void setPrefixLen(short prefixLen) {
+	this.prefixLen = prefixLen;
+    }
+
+    /**
      * Set the value of the IPv4Net address.
      *
      * @param address the address to use.
diff --git a/src/main/java/net/floodlightcontroller/util/IPv6.java b/src/main/java/net/floodlightcontroller/util/IPv6.java
index d4461c0..eda4502 100644
--- a/src/main/java/net/floodlightcontroller/util/IPv6.java
+++ b/src/main/java/net/floodlightcontroller/util/IPv6.java
@@ -1,14 +1,17 @@
 package net.floodlightcontroller.util;
 
 import org.openflow.util.HexString;
+import net.floodlightcontroller.util.serializers.IPv6Deserializer;
 import net.floodlightcontroller.util.serializers.IPv6Serializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
+import org.codehaus.jackson.map.annotate.JsonDeserialize;
 import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing an IPv6 address.
  */
+@JsonDeserialize(using=IPv6Deserializer.class)
 @JsonSerialize(using=IPv6Serializer.class)
 public class IPv6 {
     private long valueHigh;	// The higher (more significant) 64 bits
@@ -34,6 +37,17 @@
     }
 
     /**
+     * Constructor from a string.
+     *
+     * @param value the value to use.
+     */
+    public IPv6(String value) {
+	// TODO: Implement it!
+	this.valueHigh = 0;
+	this.valueLow = 0;
+    }
+
+    /**
      * Get the value of the higher (more significant) 64 bits of the address.
      *
      * @return the value of the higher (more significant) 64 bits of the
@@ -42,6 +56,15 @@
     public long valueHigh() { return valueHigh; }
 
     /**
+     * Set the value of the higher (more significant) 64 bits of the address.
+     *
+     * @param valueHigh the higher (more significant) 64 bits of the address.
+     */
+    public void setValueHigh(long valueHigh) {
+	this.valueHigh = valueHigh;
+    }
+
+    /**
      * Get the value of the lower (less significant) 64 bits of the address.
      *
      * @return the value of the lower (less significant) 64 bits of the
@@ -50,6 +73,15 @@
     public long valueLow() { return valueLow; }
 
     /**
+     * Get the value of the lower (less significant) 64 bits of the address.
+     *
+     * @param valueLow the lower (less significant) 64 bits of the address.
+     */
+    public void setValueLow(long valueLow) {
+	this.valueLow = valueLow;
+    }
+
+    /**
      * Set the value of the IPv6 address.
      *
      * @param valueHigh the higher (more significant) 64 bits of the address.
diff --git a/src/main/java/net/floodlightcontroller/util/IPv6Net.java b/src/main/java/net/floodlightcontroller/util/IPv6Net.java
index 1942293..b6f7d67 100644
--- a/src/main/java/net/floodlightcontroller/util/IPv6Net.java
+++ b/src/main/java/net/floodlightcontroller/util/IPv6Net.java
@@ -1,14 +1,17 @@
 package net.floodlightcontroller.util;
 
 import net.floodlightcontroller.util.IPv6;
+import net.floodlightcontroller.util.serializers.IPv6NetDeserializer;
 import net.floodlightcontroller.util.serializers.IPv6NetSerializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
+import org.codehaus.jackson.map.annotate.JsonDeserialize;
 import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing an IPv6 network address.
  */
+@JsonDeserialize(using=IPv6NetDeserializer.class)
 @JsonSerialize(using=IPv6NetSerializer.class)
 public class IPv6Net {
     private IPv6 address;		// The IPv6 address
@@ -33,6 +36,21 @@
     }
 
     /**
+     * Constructor from a string.
+     *
+     * @param value the value to use.
+     */
+    public IPv6Net(String value) {
+	String[] splits = value.split("/");
+	if (splits.length != 2) {
+	    throw new IllegalArgumentException("Specified IPv6Net address must contain an IPv6 " +
+					       "address and a prefix length separated by '/'");
+	}
+	this.address = new IPv6(splits[0]);
+	this.prefixLen = Short.decode(splits[1]);
+    }
+
+    /**
      * Get the address value of the IPv6Net address.
      *
      * @return the address value of the IPv6Net address.
@@ -40,6 +58,15 @@
     public IPv6 address() { return address; }
 
     /**
+     * Set the address value of the IPv6Net address.
+     *
+     * @param address the address to use.
+     */
+    public void setAddress(IPv6 address) {
+	this.address = address;
+    }
+
+    /**
      * Get the prefix length value of the IPv6Net address.
      *
      * @return the prefix length value of the IPv6Net address.
@@ -47,6 +74,15 @@
     public short prefixLen() { return prefixLen; }
 
     /**
+     * Set the prefix length value of the IPv6Net address.
+     *
+     * @param prefixLen the prefix length to use.
+     */
+    public void setPrefixLen(short prefixLen) {
+	this.prefixLen = prefixLen;
+    }
+
+    /**
      * Set the value of the IPv6Net address.
      *
      * @param address the address to use.
diff --git a/src/main/java/net/floodlightcontroller/util/Port.java b/src/main/java/net/floodlightcontroller/util/Port.java
index 0bfb07a..19bbf8f 100644
--- a/src/main/java/net/floodlightcontroller/util/Port.java
+++ b/src/main/java/net/floodlightcontroller/util/Port.java
@@ -1,14 +1,10 @@
 package net.floodlightcontroller.util;
 
-import net.floodlightcontroller.util.serializers.PortSerializer;
-
 import org.codehaus.jackson.annotate.JsonProperty;
-import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing a network port of a switch.
  */
-@JsonSerialize(using=PortSerializer.class)
 public class Port {
     private short value;
 
@@ -20,6 +16,15 @@
     }
 
     /**
+     * Constructor from another entry.
+     *
+     * @param other the other entry to use.
+     */
+    public Port(Port other) {
+	this.value = other.value();
+    }
+
+    /**
      * Constructor from a long value.
      *
      * @param value the value to use.
@@ -33,6 +38,7 @@
      *
      * @return the value of the port.
      */
+    @JsonProperty("value")
     public short value() { return value; }
 
     /**
@@ -40,6 +46,7 @@
      *
      * @param value the value to set.
      */
+    @JsonProperty("value")
     public void setValue(short value) {
 	this.value = value;
     }
diff --git a/src/main/java/net/floodlightcontroller/util/SwitchPort.java b/src/main/java/net/floodlightcontroller/util/SwitchPort.java
index 462cdfb..027b681 100644
--- a/src/main/java/net/floodlightcontroller/util/SwitchPort.java
+++ b/src/main/java/net/floodlightcontroller/util/SwitchPort.java
@@ -2,15 +2,12 @@
 
 import net.floodlightcontroller.util.Dpid;
 import net.floodlightcontroller.util.Port;
-import net.floodlightcontroller.util.serializers.SwitchPortSerializer;
 
 import org.codehaus.jackson.annotate.JsonProperty;
-import org.codehaus.jackson.map.annotate.JsonSerialize;
 
 /**
  * The class representing a Switch-Port.
  */
-@JsonSerialize(using=SwitchPortSerializer.class)
 public class SwitchPort {
     private Dpid dpid;		// The DPID of the switch
     private Port port;		// The port of the switch
@@ -37,16 +34,38 @@
      *
      * @return the DPID value of the Switch-Port.
      */
+    @JsonProperty("dpid")
     public Dpid dpid() { return dpid; }
 
     /**
+     * Set the DPID value of the Switch-Port.
+     *
+     * @param dpid the DPID to use.
+     */
+    @JsonProperty("dpid")
+    public void setDpid(Dpid dpid) {
+	this.dpid = dpid;
+    }
+
+    /**
      * Get the port value of the Switch-Port.
      *
      * @return the port value of the Switch-Port.
      */
+    @JsonProperty("port")
     public Port port() { return port; }
 
     /**
+     * Set the port value of the Switch-Port.
+     *
+     * @param port the port to use.
+     */
+    @JsonProperty("port")
+    public void setPort(Port port) {
+	this.port = port;
+    }
+
+    /**
      * Set the DPID and port values of the Switch-Port.
      *
      * @param dpid the DPID to use.
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/CallerIdSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/CallerIdSerializer.java
deleted file mode 100644
index 9935324..0000000
--- a/src/main/java/net/floodlightcontroller/util/serializers/CallerIdSerializer.java
+++ /dev/null
@@ -1,23 +0,0 @@
-package net.floodlightcontroller.util.serializers;
-
-import java.io.IOException;
-
-import org.codehaus.jackson.JsonGenerator;
-import org.codehaus.jackson.JsonProcessingException;
-import org.codehaus.jackson.map.JsonSerializer;
-import org.codehaus.jackson.map.SerializerProvider;
-
-import net.floodlightcontroller.util.CallerId;
-
-/**
- * Serialize a Caller ID as a string.
- */
-public class CallerIdSerializer extends JsonSerializer<CallerId> {
-
-    @Override
-    public void serialize(CallerId callerId, JsonGenerator jGen,
-			  SerializerProvider serializer)
-	throws IOException, JsonProcessingException {
-	jGen.writeString(callerId.toString());
-    }
-}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/DataPathEndpointsSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/DataPathEndpointsSerializer.java
deleted file mode 100644
index e05c21d..0000000
--- a/src/main/java/net/floodlightcontroller/util/serializers/DataPathEndpointsSerializer.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package net.floodlightcontroller.util.serializers;
-
-import java.io.IOException;
-
-import org.codehaus.jackson.JsonGenerator;
-import org.codehaus.jackson.JsonProcessingException;
-import org.codehaus.jackson.map.JsonSerializer;
-import org.codehaus.jackson.map.SerializerProvider;
-
-import net.floodlightcontroller.util.DataPathEndpoints;
-
-/**
- * Serialize a DataPathEndpoints as a string.
- */
-public class DataPathEndpointsSerializer extends JsonSerializer<DataPathEndpoints> {
-
-    @Override
-    public void serialize(DataPathEndpoints dataPathEndpoints,
-			  JsonGenerator jGen, SerializerProvider serializer)
-	throws IOException, JsonProcessingException {
-	jGen.writeStartObject();
-	jGen.writeObjectField("srcPort", dataPathEndpoints.srcPort());
-	jGen.writeObjectField("dstPort", dataPathEndpoints.dstPort());
-	jGen.writeEndObject();
-    }
-}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/DataPathSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/DataPathSerializer.java
deleted file mode 100644
index d150c37..0000000
--- a/src/main/java/net/floodlightcontroller/util/serializers/DataPathSerializer.java
+++ /dev/null
@@ -1,32 +0,0 @@
-package net.floodlightcontroller.util.serializers;
-
-import java.io.IOException;
-
-import org.codehaus.jackson.JsonGenerator;
-import org.codehaus.jackson.JsonProcessingException;
-import org.codehaus.jackson.map.JsonSerializer;
-import org.codehaus.jackson.map.SerializerProvider;
-
-import net.floodlightcontroller.util.DataPath;
-import net.floodlightcontroller.util.FlowEntry;
-
-/**
- * Serialize a DataPath as a string.
- */
-public class DataPathSerializer extends JsonSerializer<DataPath> {
-
-    @Override
-    public void serialize(DataPath dataPath,
-			  JsonGenerator jGen, SerializerProvider serializer)
-	throws IOException, JsonProcessingException {
-	jGen.writeStartObject();
-	jGen.writeObjectField("srcPort", dataPath.srcPort());
-	jGen.writeArrayFieldStart("flowEntries");
-	for (FlowEntry fe: dataPath.flowEntries()) {
-	    jGen.writeObject(fe);
-	}
-	jGen.writeEndArray();
-	jGen.writeObjectField("dstPort", dataPath.dstPort());
-	jGen.writeEndObject();
-    }
-}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/DpidDeserializer.java b/src/main/java/net/floodlightcontroller/util/serializers/DpidDeserializer.java
new file mode 100644
index 0000000..9297f56
--- /dev/null
+++ b/src/main/java/net/floodlightcontroller/util/serializers/DpidDeserializer.java
@@ -0,0 +1,43 @@
+package net.floodlightcontroller.util.serializers;
+
+import java.io.IOException;
+
+import org.codehaus.jackson.JsonNode;
+import org.codehaus.jackson.JsonParser;
+import org.codehaus.jackson.JsonToken;
+import org.codehaus.jackson.JsonProcessingException;
+import org.codehaus.jackson.ObjectCodec;
+import org.codehaus.jackson.map.JsonDeserializer;
+import org.codehaus.jackson.map.DeserializationContext;
+
+import net.floodlightcontroller.util.Dpid;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Deserialize a DPID from a string.
+ */
+public class DpidDeserializer extends JsonDeserializer<Dpid> {
+
+    protected static Logger log = LoggerFactory.getLogger(DpidDeserializer.class);
+
+    @Override
+    public Dpid deserialize(JsonParser jp,
+			    DeserializationContext ctxt)
+	throws IOException, JsonProcessingException {
+
+	Dpid dpid = null;
+
+	jp.nextToken();		// Move to JsonToken.START_OBJECT
+	while (jp.nextToken() != JsonToken.END_OBJECT) {
+	    String fieldname = jp.getCurrentName();
+	    if ("value".equals(fieldname)) {
+		String value = jp.getText();
+		log.debug("Fieldname: " + fieldname + " Value: " + value);
+		dpid = new Dpid(value);
+	    }
+	}
+	return dpid;
+    }
+}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/DpidSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/DpidSerializer.java
index 2b71690..06fab62 100644
--- a/src/main/java/net/floodlightcontroller/util/serializers/DpidSerializer.java
+++ b/src/main/java/net/floodlightcontroller/util/serializers/DpidSerializer.java
@@ -18,6 +18,8 @@
     public void serialize(Dpid dpid, JsonGenerator jGen,
 			  SerializerProvider serializer)
 	throws IOException, JsonProcessingException {
-	jGen.writeString(dpid.toString());
+	jGen.writeStartObject();
+	jGen.writeStringField("value", dpid.toString());
+	jGen.writeEndObject();
     }
 }
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/FlowEntryActionsSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/FlowEntryActionsSerializer.java
deleted file mode 100644
index bd5970d..0000000
--- a/src/main/java/net/floodlightcontroller/util/serializers/FlowEntryActionsSerializer.java
+++ /dev/null
@@ -1,24 +0,0 @@
-package net.floodlightcontroller.util.serializers;
-
-import java.io.IOException;
-
-import org.codehaus.jackson.JsonGenerator;
-import org.codehaus.jackson.JsonProcessingException;
-import org.codehaus.jackson.map.JsonSerializer;
-import org.codehaus.jackson.map.SerializerProvider;
-
-import net.floodlightcontroller.util.FlowEntryActions;
-
-/**
- * Serialize a FlowEntryActions as a string.
- */
-public class FlowEntryActionsSerializer extends JsonSerializer<FlowEntryActions> {
-
-    @Override
-    public void serialize(FlowEntryActions flowEntryActions,
-			  JsonGenerator jGen,
-			  SerializerProvider serializer)
-	throws IOException, JsonProcessingException {
-	jGen.writeObject(flowEntryActions);
-    }
-}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/FlowEntryErrorStateSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/FlowEntryErrorStateSerializer.java
deleted file mode 100644
index 2518e86..0000000
--- a/src/main/java/net/floodlightcontroller/util/serializers/FlowEntryErrorStateSerializer.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package net.floodlightcontroller.util.serializers;
-
-import java.io.IOException;
-
-import org.codehaus.jackson.JsonGenerator;
-import org.codehaus.jackson.JsonProcessingException;
-import org.codehaus.jackson.map.JsonSerializer;
-import org.codehaus.jackson.map.SerializerProvider;
-
-import net.floodlightcontroller.util.FlowEntryErrorState;
-
-/**
- * Serialize a Flow Entry Error State as a string.
- */
-public class FlowEntryErrorStateSerializer extends JsonSerializer<FlowEntryErrorState> {
-
-    @Override
-    public void serialize(FlowEntryErrorState flowEntryErrorState,
-			  JsonGenerator jGen, SerializerProvider serializer)
-	throws IOException, JsonProcessingException {
-	jGen.writeStartObject();
-	jGen.writeNumberField("type", flowEntryErrorState.type());
-	jGen.writeNumberField("code", flowEntryErrorState.code());
-	jGen.writeEndObject();
-    }
-}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/FlowEntryIdDeserializer.java b/src/main/java/net/floodlightcontroller/util/serializers/FlowEntryIdDeserializer.java
new file mode 100644
index 0000000..e6481d5
--- /dev/null
+++ b/src/main/java/net/floodlightcontroller/util/serializers/FlowEntryIdDeserializer.java
@@ -0,0 +1,43 @@
+package net.floodlightcontroller.util.serializers;
+
+import java.io.IOException;
+
+import org.codehaus.jackson.JsonNode;
+import org.codehaus.jackson.JsonParser;
+import org.codehaus.jackson.JsonToken;
+import org.codehaus.jackson.JsonProcessingException;
+import org.codehaus.jackson.ObjectCodec;
+import org.codehaus.jackson.map.JsonDeserializer;
+import org.codehaus.jackson.map.DeserializationContext;
+
+import net.floodlightcontroller.util.FlowEntryId;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Deserialize a Flow Entry ID from a string.
+ */
+public class FlowEntryIdDeserializer extends JsonDeserializer<FlowEntryId> {
+
+    protected static Logger log = LoggerFactory.getLogger(FlowEntryIdDeserializer.class);
+
+    @Override
+    public FlowEntryId deserialize(JsonParser jp,
+				   DeserializationContext ctxt)
+	throws IOException, JsonProcessingException {
+
+	FlowEntryId flowEntryId = null;
+
+	jp.nextToken();		// Move to JsonToken.START_OBJECT
+	while (jp.nextToken() != JsonToken.END_OBJECT) {
+	    String fieldname = jp.getCurrentName();
+	    if ("value".equals(fieldname)) {
+		String value = jp.getText();
+		log.debug("Fieldname: " + fieldname + " Value: " + value);
+		flowEntryId = new FlowEntryId(value);
+	    }
+	}
+	return flowEntryId;
+    }
+}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/FlowEntryMatchSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/FlowEntryMatchSerializer.java
deleted file mode 100644
index 0de3b08..0000000
--- a/src/main/java/net/floodlightcontroller/util/serializers/FlowEntryMatchSerializer.java
+++ /dev/null
@@ -1,28 +0,0 @@
-package net.floodlightcontroller.util.serializers;
-
-import java.io.IOException;
-
-import org.codehaus.jackson.JsonGenerator;
-import org.codehaus.jackson.JsonProcessingException;
-import org.codehaus.jackson.map.JsonSerializer;
-import org.codehaus.jackson.map.SerializerProvider;
-
-import net.floodlightcontroller.util.FlowEntryMatch;
-
-/**
- * Serialize a FlowEntryMatch as a string.
- */
-public class FlowEntryMatchSerializer extends JsonSerializer<FlowEntryMatch> {
-
-    @Override
-    public void serialize(FlowEntryMatch flowEntryMatch,
-			  JsonGenerator jGen, SerializerProvider serializer)
-	throws IOException, JsonProcessingException {
-	jGen.writeStartObject();
-	jGen.writeObjectField("srcMac", flowEntryMatch.srcMac());
-	jGen.writeObjectField("dstMac", flowEntryMatch.dstMac());
-	jGen.writeObjectField("srcIPv4Net", flowEntryMatch.srcIPv4Net());
-	jGen.writeObjectField("dstIPv4Net", flowEntryMatch.dstIPv4Net());
-	jGen.writeEndObject();
-    }
-}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/FlowEntrySerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/FlowEntrySerializer.java
deleted file mode 100644
index 9912d55..0000000
--- a/src/main/java/net/floodlightcontroller/util/serializers/FlowEntrySerializer.java
+++ /dev/null
@@ -1,37 +0,0 @@
-package net.floodlightcontroller.util.serializers;
-
-import java.io.IOException;
-
-import org.codehaus.jackson.JsonGenerator;
-import org.codehaus.jackson.JsonProcessingException;
-import org.codehaus.jackson.map.JsonSerializer;
-import org.codehaus.jackson.map.SerializerProvider;
-
-import net.floodlightcontroller.util.FlowEntry;
-
-/**
- * Serialize a FlowEntry as a string.
- */
-public class FlowEntrySerializer extends JsonSerializer<FlowEntry> {
-
-    @Override
-    public void serialize(FlowEntry flowEntry,
-			  JsonGenerator jGen, SerializerProvider serializer)
-	throws IOException, JsonProcessingException {
-	jGen.writeStartObject();
-	jGen.writeObjectField("flowEntryId", flowEntry.flowEntryId());
-	jGen.writeObjectField("flowEntryMatch", flowEntry.flowEntryMatch());
-	jGen.writeObjectField("flowEntryActions",
-			      flowEntry.flowEntryActions());
-	jGen.writeObjectField("dpid", flowEntry.dpid());
-	jGen.writeObjectField("inPort", flowEntry.inPort());
-	jGen.writeObjectField("outPort", flowEntry.outPort());
-	jGen.writeObjectField("flowEntryUserState",
-			      flowEntry.flowEntryUserState());
-	jGen.writeObjectField("flowEntrySwitchState",
-			      flowEntry.flowEntrySwitchState());
-	jGen.writeObjectField("flowEntryErrorState",
-			      flowEntry.flowEntryErrorState());
-	jGen.writeEndObject();
-    }
-}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/FlowIdDeserializer.java b/src/main/java/net/floodlightcontroller/util/serializers/FlowIdDeserializer.java
new file mode 100644
index 0000000..a7f53d4
--- /dev/null
+++ b/src/main/java/net/floodlightcontroller/util/serializers/FlowIdDeserializer.java
@@ -0,0 +1,43 @@
+package net.floodlightcontroller.util.serializers;
+
+import java.io.IOException;
+
+import org.codehaus.jackson.JsonNode;
+import org.codehaus.jackson.JsonParser;
+import org.codehaus.jackson.JsonToken;
+import org.codehaus.jackson.JsonProcessingException;
+import org.codehaus.jackson.ObjectCodec;
+import org.codehaus.jackson.map.JsonDeserializer;
+import org.codehaus.jackson.map.DeserializationContext;
+
+import net.floodlightcontroller.util.FlowId;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Deserialize a Flow ID from a string.
+ */
+public class FlowIdDeserializer extends JsonDeserializer<FlowId> {
+
+    protected static Logger log = LoggerFactory.getLogger(FlowIdDeserializer.class);
+
+    @Override
+    public FlowId deserialize(JsonParser jp,
+			      DeserializationContext ctxt)
+	throws IOException, JsonProcessingException {
+
+	FlowId flowId = null;
+
+	jp.nextToken();		// Move to JsonToken.START_OBJECT
+	while (jp.nextToken() != JsonToken.END_OBJECT) {
+	    String fieldname = jp.getCurrentName();
+	    if ("value".equals(fieldname)) {
+		String value = jp.getText();
+		log.debug("Fieldname: " + fieldname + " Value: " + value);
+		flowId = new FlowId(value);
+	    }
+	}
+	return flowId;
+    }
+}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/FlowIdSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/FlowIdSerializer.java
index 0e69273..6f1a6f6 100644
--- a/src/main/java/net/floodlightcontroller/util/serializers/FlowIdSerializer.java
+++ b/src/main/java/net/floodlightcontroller/util/serializers/FlowIdSerializer.java
@@ -18,6 +18,8 @@
     public void serialize(FlowId flowId, JsonGenerator jGen,
 			  SerializerProvider serializer)
 	throws IOException, JsonProcessingException {
-	jGen.writeString(flowId.toString());
+	jGen.writeStartObject();
+	jGen.writeStringField("value", flowId.toString());
+	jGen.writeEndObject();
     }
 }
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/FlowPathSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/FlowPathSerializer.java
deleted file mode 100644
index a6a5405..0000000
--- a/src/main/java/net/floodlightcontroller/util/serializers/FlowPathSerializer.java
+++ /dev/null
@@ -1,27 +0,0 @@
-package net.floodlightcontroller.util.serializers;
-
-import java.io.IOException;
-
-import org.codehaus.jackson.JsonGenerator;
-import org.codehaus.jackson.JsonProcessingException;
-import org.codehaus.jackson.map.JsonSerializer;
-import org.codehaus.jackson.map.SerializerProvider;
-
-import net.floodlightcontroller.util.FlowPath;
-
-/**
- * Serialize a FlowPath as a string.
- */
-public class FlowPathSerializer extends JsonSerializer<FlowPath> {
-
-    @Override
-    public void serialize(FlowPath flowPath,
-			  JsonGenerator jGen, SerializerProvider serializer)
-	throws IOException, JsonProcessingException {
-	jGen.writeStartObject();
-	jGen.writeObjectField("flowId", flowPath.flowId());
-	jGen.writeObjectField("installerId", flowPath.installerId());
-	jGen.writeObjectField("dataPath", flowPath.dataPath());
-	jGen.writeEndObject();
-    }
-}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/IPv4Deserializer.java b/src/main/java/net/floodlightcontroller/util/serializers/IPv4Deserializer.java
new file mode 100644
index 0000000..7ce7d5c
--- /dev/null
+++ b/src/main/java/net/floodlightcontroller/util/serializers/IPv4Deserializer.java
@@ -0,0 +1,43 @@
+package net.floodlightcontroller.util.serializers;
+
+import java.io.IOException;
+
+import org.codehaus.jackson.JsonNode;
+import org.codehaus.jackson.JsonParser;
+import org.codehaus.jackson.JsonToken;
+import org.codehaus.jackson.JsonProcessingException;
+import org.codehaus.jackson.ObjectCodec;
+import org.codehaus.jackson.map.JsonDeserializer;
+import org.codehaus.jackson.map.DeserializationContext;
+
+import net.floodlightcontroller.util.IPv4;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Deserialize an IPv4 from a string.
+ */
+public class IPv4Deserializer extends JsonDeserializer<IPv4> {
+
+    protected static Logger log = LoggerFactory.getLogger(IPv4Deserializer.class);
+
+    @Override
+    public IPv4 deserialize(JsonParser jp,
+			    DeserializationContext ctxt)
+	throws IOException, JsonProcessingException {
+
+	IPv4 ipv4 = null;
+
+	jp.nextToken();		// Move to JsonToken.START_OBJECT
+	while (jp.nextToken() != JsonToken.END_OBJECT) {
+	    String fieldname = jp.getCurrentName();
+	    if ("value".equals(fieldname)) {
+		String value = jp.getText();
+		log.debug("Fieldname: " + fieldname + " Value: " + value);
+		ipv4 = new IPv4(value);
+	    }
+	}
+	return ipv4;
+    }
+}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/IPv4NetDeserializer.java b/src/main/java/net/floodlightcontroller/util/serializers/IPv4NetDeserializer.java
new file mode 100644
index 0000000..e35fc80
--- /dev/null
+++ b/src/main/java/net/floodlightcontroller/util/serializers/IPv4NetDeserializer.java
@@ -0,0 +1,43 @@
+package net.floodlightcontroller.util.serializers;
+
+import java.io.IOException;
+
+import org.codehaus.jackson.JsonNode;
+import org.codehaus.jackson.JsonParser;
+import org.codehaus.jackson.JsonToken;
+import org.codehaus.jackson.JsonProcessingException;
+import org.codehaus.jackson.ObjectCodec;
+import org.codehaus.jackson.map.JsonDeserializer;
+import org.codehaus.jackson.map.DeserializationContext;
+
+import net.floodlightcontroller.util.IPv4Net;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Deserialize an IPv4Net from a string.
+ */
+public class IPv4NetDeserializer extends JsonDeserializer<IPv4Net> {
+
+    protected static Logger log = LoggerFactory.getLogger(IPv4NetDeserializer.class);
+
+    @Override
+    public IPv4Net deserialize(JsonParser jp,
+			       DeserializationContext ctxt)
+	throws IOException, JsonProcessingException {
+
+	IPv4Net ipv4Net = null;
+
+	jp.nextToken();		// Move to JsonToken.START_OBJECT
+	while (jp.nextToken() != JsonToken.END_OBJECT) {
+	    String fieldname = jp.getCurrentName();
+	    if ("value".equals(fieldname)) {
+		String value = jp.getText();
+		log.debug("Fieldname: " + fieldname + " Value: " + value);
+		ipv4Net = new IPv4Net(value);
+	    }
+	}
+	return ipv4Net;
+    }
+}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/IPv4NetSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/IPv4NetSerializer.java
index fc71dd3..5c5e1d0 100644
--- a/src/main/java/net/floodlightcontroller/util/serializers/IPv4NetSerializer.java
+++ b/src/main/java/net/floodlightcontroller/util/serializers/IPv4NetSerializer.java
@@ -18,6 +18,8 @@
     public void serialize(IPv4Net ipv4Net, JsonGenerator jGen,
 			  SerializerProvider serializer)
 	throws IOException, JsonProcessingException {
-	jGen.writeString(ipv4Net.toString());
+	jGen.writeStartObject();
+	jGen.writeStringField("value", ipv4Net.toString());
+	jGen.writeEndObject();
     }
 }
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/IPv4Serializer.java b/src/main/java/net/floodlightcontroller/util/serializers/IPv4Serializer.java
index 68e952c..ba7d825 100644
--- a/src/main/java/net/floodlightcontroller/util/serializers/IPv4Serializer.java
+++ b/src/main/java/net/floodlightcontroller/util/serializers/IPv4Serializer.java
@@ -18,6 +18,8 @@
     public void serialize(IPv4 ipv4, JsonGenerator jGen,
 			  SerializerProvider serializer)
 	throws IOException, JsonProcessingException {
-	jGen.writeString(ipv4.toString());
+	jGen.writeStartObject();
+	jGen.writeStringField("value", ipv4.toString());
+	jGen.writeEndObject();
     }
 }
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/IPv6Deserializer.java b/src/main/java/net/floodlightcontroller/util/serializers/IPv6Deserializer.java
new file mode 100644
index 0000000..6713f93
--- /dev/null
+++ b/src/main/java/net/floodlightcontroller/util/serializers/IPv6Deserializer.java
@@ -0,0 +1,43 @@
+package net.floodlightcontroller.util.serializers;
+
+import java.io.IOException;
+
+import org.codehaus.jackson.JsonNode;
+import org.codehaus.jackson.JsonParser;
+import org.codehaus.jackson.JsonToken;
+import org.codehaus.jackson.JsonProcessingException;
+import org.codehaus.jackson.ObjectCodec;
+import org.codehaus.jackson.map.JsonDeserializer;
+import org.codehaus.jackson.map.DeserializationContext;
+
+import net.floodlightcontroller.util.IPv6;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Deserialize an IPv6 from a string.
+ */
+public class IPv6Deserializer extends JsonDeserializer<IPv6> {
+
+    protected static Logger log = LoggerFactory.getLogger(IPv6Deserializer.class);
+
+    @Override
+    public IPv6 deserialize(JsonParser jp,
+			    DeserializationContext ctxt)
+	throws IOException, JsonProcessingException {
+
+	IPv6 ipv6 = null;
+
+	jp.nextToken();		// Move to JsonToken.START_OBJECT
+	while (jp.nextToken() != JsonToken.END_OBJECT) {
+	    String fieldname = jp.getCurrentName();
+	    if ("value".equals(fieldname)) {
+		String value = jp.getText();
+		log.debug("Fieldname: " + fieldname + " Value: " + value);
+		ipv6 = new IPv6(value);
+	    }
+	}
+	return ipv6;
+    }
+}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/IPv6NetDeserializer.java b/src/main/java/net/floodlightcontroller/util/serializers/IPv6NetDeserializer.java
new file mode 100644
index 0000000..596ee50
--- /dev/null
+++ b/src/main/java/net/floodlightcontroller/util/serializers/IPv6NetDeserializer.java
@@ -0,0 +1,43 @@
+package net.floodlightcontroller.util.serializers;
+
+import java.io.IOException;
+
+import org.codehaus.jackson.JsonNode;
+import org.codehaus.jackson.JsonParser;
+import org.codehaus.jackson.JsonToken;
+import org.codehaus.jackson.JsonProcessingException;
+import org.codehaus.jackson.ObjectCodec;
+import org.codehaus.jackson.map.JsonDeserializer;
+import org.codehaus.jackson.map.DeserializationContext;
+
+import net.floodlightcontroller.util.IPv6Net;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Deserialize an IPv6Net from a string.
+ */
+public class IPv6NetDeserializer extends JsonDeserializer<IPv6Net> {
+
+    protected static Logger log = LoggerFactory.getLogger(IPv6NetDeserializer.class);
+
+    @Override
+    public IPv6Net deserialize(JsonParser jp,
+			       DeserializationContext ctxt)
+	throws IOException, JsonProcessingException {
+
+	IPv6Net ipv6Net = null;
+
+	jp.nextToken();		// Move to JsonToken.START_OBJECT
+	while (jp.nextToken() != JsonToken.END_OBJECT) {
+	    String fieldname = jp.getCurrentName();
+	    if ("value".equals(fieldname)) {
+		String value = jp.getText();
+		log.debug("Fieldname: " + fieldname + " Value: " + value);
+		ipv6Net = new IPv6Net(value);
+	    }
+	}
+	return ipv6Net;
+    }
+}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/IPv6NetSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/IPv6NetSerializer.java
index 0f59dc2..fc5d262 100644
--- a/src/main/java/net/floodlightcontroller/util/serializers/IPv6NetSerializer.java
+++ b/src/main/java/net/floodlightcontroller/util/serializers/IPv6NetSerializer.java
@@ -18,6 +18,8 @@
     public void serialize(IPv6Net ipv6Net, JsonGenerator jGen,
 			  SerializerProvider serializer)
 	throws IOException, JsonProcessingException {
-	jGen.writeString(ipv6Net.toString());
+	jGen.writeStartObject();
+	jGen.writeStringField("value", ipv6Net.toString());
+	jGen.writeEndObject();
     }
 }
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/IPv6Serializer.java b/src/main/java/net/floodlightcontroller/util/serializers/IPv6Serializer.java
index dabbfa4..0b08a63 100644
--- a/src/main/java/net/floodlightcontroller/util/serializers/IPv6Serializer.java
+++ b/src/main/java/net/floodlightcontroller/util/serializers/IPv6Serializer.java
@@ -18,6 +18,8 @@
     public void serialize(IPv6 ipv6, JsonGenerator jGen,
 			  SerializerProvider serializer)
 	throws IOException, JsonProcessingException {
-	jGen.writeString(ipv6.toString());
+	jGen.writeStartObject();
+	jGen.writeStringField("value", ipv6.toString());
+	jGen.writeEndObject();
     }
 }
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/PortSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/PortSerializer.java
deleted file mode 100644
index e79c600..0000000
--- a/src/main/java/net/floodlightcontroller/util/serializers/PortSerializer.java
+++ /dev/null
@@ -1,23 +0,0 @@
-package net.floodlightcontroller.util.serializers;
-
-import java.io.IOException;
-
-import org.codehaus.jackson.JsonGenerator;
-import org.codehaus.jackson.JsonProcessingException;
-import org.codehaus.jackson.map.JsonSerializer;
-import org.codehaus.jackson.map.SerializerProvider;
-
-import net.floodlightcontroller.util.Port;
-
-/**
- * Serialize a Port as a string.
- */
-public class PortSerializer extends JsonSerializer<Port> {
-
-    @Override
-    public void serialize(Port port, JsonGenerator jGen,
-			  SerializerProvider serializer)
-	throws IOException, JsonProcessingException {
-	jGen.writeNumber(port.value());
-    }
-}
diff --git a/src/main/java/net/floodlightcontroller/util/serializers/SwitchPortSerializer.java b/src/main/java/net/floodlightcontroller/util/serializers/SwitchPortSerializer.java
deleted file mode 100644
index 8abbb52..0000000
--- a/src/main/java/net/floodlightcontroller/util/serializers/SwitchPortSerializer.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package net.floodlightcontroller.util.serializers;
-
-import java.io.IOException;
-
-import org.codehaus.jackson.JsonGenerator;
-import org.codehaus.jackson.JsonProcessingException;
-import org.codehaus.jackson.map.JsonSerializer;
-import org.codehaus.jackson.map.SerializerProvider;
-
-import net.floodlightcontroller.util.SwitchPort;
-
-/**
- * Serialize a SwitchPort as a string.
- */
-public class SwitchPortSerializer extends JsonSerializer<SwitchPort> {
-
-    @Override
-    public void serialize(SwitchPort switchPort,
-			  JsonGenerator jGen, SerializerProvider serializer)
-	throws IOException, JsonProcessingException {
-	jGen.writeStartObject();
-	jGen.writeObjectField("dpid", switchPort.dpid());
-	jGen.writeObjectField("port", switchPort.port());
-	jGen.writeEndObject();
-    }
-}
diff --git a/start-cassandra.sh b/start-cassandra.sh
index 011c09d..d670511 100755
--- a/start-cassandra.sh
+++ b/start-cassandra.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+# Set paths
+FL_HOME=`dirname $0`
 CASSANDRA_DIR=${HOME}/apache-cassandra-1.1.4
 LOGDIR=${HOME}/ONOS/onos-logs
 CASSANDRA_LOG=$LOGDIR/cassandara.`hostname`.log
@@ -43,16 +45,18 @@
   done
 }
 
-#function deldb {
+function deldb {
 #   # Delete the berkeley db database
-#   if [ -d "/tmp/cassandra.titan" ]; then
-#      rm -rf /tmp/cassandra.titan
-#      mkdir /tmp/cassandra.titan
-#   fi
-#}
+   if [ -d "/tmp/cassandra.titan" ]; then
+      echo "deleting berkeley db dir"
+      sudo rm -rf /tmp/cassandra.titan
+   fi
+}
 
 case "$1" in
   start)
+    deldb
+    cp $FL_HOME/cassandra.titan /tmp
     stop
     start 
     ;;
diff --git a/start-onos.sh b/start-onos.sh
index 19834af..0ef6ecd 100755
--- a/start-onos.sh
+++ b/start-onos.sh
@@ -103,10 +103,22 @@
       mkdir /tmp/cassandra.titan
    fi
 }
+function check_db {
+   if [ -d "/tmp/cassandra.titan" ]; then
+      echo "Cassandra is running on local berkely db. Exitting"
+      exit
+   fi
+   n=`ps -edalf |grep java |grep apache-cassandra | wc -l`
+   if [ x$n != "x1" ]; then
+      echo "Cassandra is not running. Exitting"
+      exit
+   fi
+}
 
 case "$1" in
   start)
     stop
+    check_db
     start 
     ;;
   stop)
diff --git a/test-network/mininet/fat_tree.py b/test-network/mininet/fat_tree.py
new file mode 100755
index 0000000..c7e4178
--- /dev/null
+++ b/test-network/mininet/fat_tree.py
@@ -0,0 +1,163 @@
+#!/usr/bin/python
+
+NWID="a"
+CONTROLLER_IP='127.0.0.1'
+
+"""
+Start up a Simple topology
+"""
+from mininet.net import Mininet
+from mininet.node import Controller, RemoteController
+from mininet.log import setLogLevel, info, error, warn, debug
+from mininet.cli import CLI
+from mininet.topo import Topo
+from mininet.util import quietRun
+from mininet.moduledeps import pathCheck
+from mininet.link import Link, TCLink
+
+from sys import exit
+import os.path
+from subprocess import Popen, STDOUT, PIPE
+
+import sys
+
+#import argparse
+
+class MyController( Controller ):
+    def __init__( self, name, ip=CONTROLLER_IP, port=6633, **kwargs):
+        """Init.
+           name: name to give controller
+           ip: the IP address where the remote controller is
+           listening
+           port: the port where the remote controller is listening"""
+        Controller.__init__( self, name, ip=ip, port=port, **kwargs )
+
+    def start( self ):
+        "Overridden to do nothing."
+        return
+
+    def stop( self ):
+        "Overridden to do nothing."
+        return
+
+    def checkListening( self ):
+        "Warn if remote controller is not accessible"
+        listening = self.cmd( "echo A | telnet -e A %s %d" %
+                              ( self.ip, self.port ) )
+        if 'Unable' in listening:
+            warn( "Unable to contact the remote controller"
+                  " at %s:%d\n" % ( self.ip, self.port ) )
+
+class SDNTopo( Topo ):
+    "SDN Topology"
+
+    def __init__( self, *args, **kwargs ):
+        Topo.__init__( self, *args, **kwargs )
+
+        dist_sw = []
+        aggr_sw = []
+        core_sw = []
+        host = []
+        root = []
+
+        for i in range (4):
+            name_suffix = '%s' % NWID + '0d' + '%02d' % i
+            dpid = '0000' + '0000' + '000' + name_suffix
+            sw = self.addSwitch('sw'+name_suffix, dpid=dpid)
+            dist_sw.append(sw)
+
+        for i in range (4):
+            name_suffix = '%s' % NWID + '0a' + '%02d' % i
+            dpid = '0000' + '0000' + '000' + name_suffix
+            sw = self.addSwitch('sw'+name_suffix, dpid=dpid)
+            aggr_sw.append(sw)
+
+        for i in range (2):
+            name_suffix = '%s' % NWID + '0c' + '%02d' % i
+            dpid = '0000' + '0000' + '000' + name_suffix
+            sw = self.addSwitch('sw' + name_suffix, dpid=dpid)
+            core_sw.append(sw)
+
+        for i in range (8):
+            host.append(self.addHost( 'host%d' % i ))
+
+        for i in range (8):
+            root.append(self.addHost( 'root%d' % i, inNamespace=False ))
+
+        for i in range (8):
+            self.addLink(host[i], dist_sw[int(i/2)])
+
+        for i in range (4):
+            for j in range (int(i/2) * 2, (int(i/2) * 2 + 2)):
+                print 'add link btween dist_sw[%d] -> aggr_sw[%d]' % (i, j)
+                self.addLink(dist_sw[i], aggr_sw[j])
+
+        for i in range (4):
+            for j in range (int(i/4) * 4, int(i/4) * 4 + 2):
+                print 'add link btween aggr_sw[%d] -> core_sw[%d]' % (i, j)
+                self.addLink(aggr_sw[i], core_sw[j])
+
+        for i in range (8):
+            self.addLink(root[i], host[i])
+
+def startsshd( host ):
+    "Start sshd on host"
+    info( '*** Starting sshd\n' )
+    name, intf, ip = host.name, host.defaultIntf(), host.IP()
+    banner = '/tmp/%s.banner' % name
+    host.cmd( 'echo "Welcome to %s at %s" >  %s' % ( name, ip, banner ) )
+    host.cmd( '/usr/sbin/sshd -o "Banner %s"' % banner, '-o "UseDNS no"' )
+    info( '***', host.name, 'is running sshd on', intf, 'at', ip, '\n' )
+
+def startsshds ( hosts ):
+    for h in hosts:
+        startsshd( h )
+
+def stopsshd( ):
+    "Stop *all* sshd processes with a custom banner"
+    info( '*** Shutting down stale sshd/Banner processes ',
+          quietRun( "pkill -9 -f Banner" ), '\n' )
+
+def sdnnet(opt):
+    topo = SDNTopo()
+    info( '*** Creating network\n' )
+    net = Mininet( topo=topo, controller=MyController, link=TCLink)
+
+    host = []
+    for i in range (8):
+      host.append(net.get( 'host%d' % i ))
+
+    net.start()
+
+    core_sw = []
+    for i in range (2):
+        name_suffix = '%s' % NWID + '0c' + '%02d' % i
+        net.get('sw' + name_suffix).attach('tap%s0' % NWID)
+
+    for i in range (8):
+        host[i].defaultIntf().setIP('192.168.10.10%d/24' % i) 
+
+    root = []
+    for i in range (8):
+        root.append(net.get( 'root%d' % i ))
+
+    for i in range (8):
+        host[i].intf('host%d-eth1' % i).setIP('1.1.%d.1/24' % i)
+        root[i].intf('root%d-eth0' % i).setIP('1.1.%d.2/24' % i)
+
+    stopsshd ()
+    startsshds ( host )
+
+    if opt=="cli":
+        CLI(net)
+        stopsshd()
+        net.stop()
+
+if __name__ == '__main__':
+    setLogLevel( 'info' )
+    if len(sys.argv) == 1:
+      sdnnet("cli")
+    elif len(sys.argv) == 2 and sys.argv[1] == "-n":
+      sdnnet("nocli")
+    else:
+      print "%s [-n]" % sys.argv[0]
diff --git a/web/shortest_path.py b/web/shortest_path.py
index 5bea182..381d052 100755
--- a/web/shortest_path.py
+++ b/web/shortest_path.py
@@ -34,6 +34,10 @@
     print '%s' % (txt)
 
 # @app.route("/wm/topology/route/<srcdpid>/<srcport>/<destdpid>/<destport>/json")
+#
+# Sample output:
+# {'dstPort': {'port': {'value': 0}, 'dpid': {'value': '00:00:00:00:00:00:00:02'}}, 'srcPort': {'port': {'value': 0}, 'dpid': {'value': '00:00:00:00:00:00:00:01'}}, 'flowEntries': [{'outPort': {'value': 1}, 'flowEntryErrorState': None, 'flowEntryMatch': None, 'flowEntryActions': None, 'inPort': {'value': 0}, 'flowEntryId': None, 'flowEntryUserState': 'FE_USER_UNKNOWN', 'dpid': {'value': '00:00:00:00:00:00:00:01'}, 'flowEntrySwitchState': 'FE_SWITCH_UNKNOWN'}, {'outPort': {'value': 0}, 'flowEntryErrorState': None, 'flowEntryMatch': None, 'flowEntryActions': None, 'inPort': {'value': 9}, 'flowEntryId': None, 'flowEntryUserState': 'FE_USER_UNKNOWN', 'dpid': {'value': '00:00:00:00:00:00:00:02'}, 'flowEntrySwitchState': 'FE_SWITCH_UNKNOWN'}]}
+#
 def shortest_path(v1, p1, v2, p2):
   try:
     command = "curl -s http://%s:%s/wm/topology/route/%s/%s/%s/%s/json" % (ControllerIP, ControllerPort, v1, p1, v2, p2)
@@ -46,10 +50,18 @@
   debug("shortest_path %s" % command)
   debug("parsed %s" % parsedResult)
 
-  for v in parsedResult:
-    dpid = v['switch'];
-    port = v['port'];
-    print "PathEntry: (%s, %s)" % (dpid, port)
+  srcSwitch = parsedResult['srcPort']['dpid']['value'];
+  srcPort = parsedResult['srcPort']['port']['value'];
+  dstSwitch = parsedResult['dstPort']['dpid']['value'];
+  dstPort = parsedResult['dstPort']['port']['value'];
+
+  print "DataPath: (src = %s/%s dst = %s/%s)" % (srcSwitch, srcPort, dstSwitch, dstPort);
+
+  for f in parsedResult['flowEntries']:
+    inPort = f['inPort']['value'];
+    outPort = f['outPort']['value'];
+    dpid = f['dpid']['value']
+    print "FlowEntry: (%s, %s, %s)" % (inPort, dpid, outPort)
 
 
 if __name__ == "__main__":